Valve-grinding tool



J. E, W'AINWRIGHT.

VALVE GRlNDiNG -IOOL.

APPLICATION FILED AUG.9, 1919.

1,345,043 Patented June 29, 1920.

LE. WAINWRIGHT.

VALVE GRINDLNG TOOL.

APPLICATION FILED Aue.a. 1919.

1,345QO43, Patented June 29, 1920.

' 2 SHEETS-SHEET 2.

Jaw uh E JOSEPH WAINWRIGHT, OF'BROOKLYN, NEW YORK.

VALVE-GRINDING TOOL.

Specification of Letters Patent.

Patented June 29, 1920.

' Application filed August 9, 1919. Serial No. 316,347.

To all whom it may concern:

Be it known that I, JOSEPH E. ,WAIN- WRIGHT, a citizen of the United States, residing at Brooklyn, in the countyof Kings and'State of New York, have invented certain new and useful Improvements in Valve- Grinding Tools, of which the following is a specification.

This invention relates to valve grinding tools and more particularly to a manually operated implement for grinding valves of internal combustion engines.

The primary object of the invention is to provide a simple and durable tool which may be easily operatedv for grinding disk valves while they are disposed in automobile engines. r m V A further object" of the invention is to provide a valve grinding tool which may be operated to prevent lost motion; which will dispense with intricate mechanism and thereby reduce friction; which may be held firmly in position while in use, so that the grinding will be steady and uniform so that the valves will be ground evenly and quickly so thatthey will be air tight.

A further object of this invention is the provisionof a device of this character which consists of comparatively few parts and 1s simple in construction,- but durable and well adapted to withstand the rough usage to which devices of this character are ordinarily subjected.

For a full description of the invention and the advantages and merits thereof, reference is to be had to the following description and accompanying drawings,in which Figure 1 is a'perspective view of the implement constructed in accordance with my invention, e

Fig. 2 is a longitudinal section through the handleof the implement, a l

' Fig. 3 is'a transverse section through the driving wheel,

Fig. 4 is a detail section through the valve engaging element, illustrating its applica-' tion to a valve, of conventional type,

Fig. 5 is a transverse section through the valve engagingelement taken at right angles to thatshown in Fig. 4,

Fig. 6 is a detail perspective view of one of the .valve engaging pins,

Fig. 7 is a longitudinal section through the handle of the actuating bow showing the adjustment means for the bow,

Fig. 8 is a perspective View of one of the coupling members for the bow string,

Fig. 9 is a perspective view of oneend of the flexible bow.

Referring to the drawings, wherein is illustrated the preferred form of my invention, in which like characters of reference indicate like or corresponding parts throughout the several views, the spindle 1 may be of any desired length and is provlded at one'end with the handle 2. This handle as shown to advantage in Fig. 2 comprises the hand grip portion 3 which is provided with a longitudinal socket 4 into which a sleeve-5 isfitted. in one end of the socket l isv mounted a bearing member 6 which is provided with a conical recess 7 to receive the pointed end of the spindle 1. This member 6, therefore, provides a bearing for the pointed end of the splndle so thatthe latter may freely rotate in the handle. The sleeve or bushing 5 is provided on one end with an enlarged flange forming a collar 8, at the end of the handle, and a transverse set screw 9 is extended through a screw threaded opening in. the collar and the end of the" set screw is received in an'annular groove 10 formed in the spindle soithat the spindle will be held in proper position within the handle and at the ,same time permitted to freely rotate.

Fixed .to the spindle, at any desired point,

intermediate its ends is a bushing 11 which may be swaged, keyed or otherwise rigidly fixed to the spindle. The pulley or actuating wheel 12 is mounted upon this bushing 11 and the ends of the bushing are flanged as indicated at 13 to maintain the pulley in position.

The pulley is provided with the annular groove '14 which receives the operating belt 15.

wire, preferably -music wire,'and. is bow shaped as shown. One'terminal of the bow which a screw threaded rod 21 is extended,

g This belt is preferably "constructed of strong-material, preferably catgut. The how 16 is constructed of steel ward end of the rod 21 projects beyond the nut 23 and its terminal is .provided with a loop 24 which receives the coupling member 25 similar to the coupling member 18 whereby the opposite end of the belt 15 may be attached to the adjustable rod 21. It will be understood that the belt maybe tightened or loosened by varying the position of the nuts 22 and 23 and the bow may also be properly tensioned by screwing the nut 23 toward the handle 20. The provision of the socket member 19 also gives the desired rigidity to the bow' at the point wherethe' strain is greatest without impairing the resiliencyof the bow.

The valve engagingmember is attached to the lower endof .the spindle land comprisesa disk 26'having a centralopening to receive the lower end of the spindle 1.. The under surface of the disk 26 is providedwith a central diametrically extending "groove 27 andthe lower end ofthe spindle l is slotted as indicated at 28 to receive a plate 28 which forms a valve'engaging member for certain types of valves. The upper edge ofthe plate is disposed in the groove 27 and passes through the slotted end of the spindle I as shownand is held i'n-positionby a fastening pin 29 passed transversely through the plate and slotted end of the spindle; In this but the disk'26 is held againstrotation on the spindle. The disk is also'provided with diametrically opposite slots 30,. each of which receives a valve engaging pin 31.. Each pin 31 comprises a square head 32 adapted to fit in oneof the slots. 30 and a a screw threaded shank 33 for receiving the fastening nut 34 whereby the. pin may be held in the desired adjusted'position. The

screw threaded portion has-a reduced extension '35'form1ng apin to befireceived in one of the 'recesses commonly found in the con ventional form :of valve as shownin Fig. 4.

Themembers 31- are adjustable toward or away from each other to be received in the openings in thevalve "member and are. re-

. versiblesothat they may be inverted whereby the'pins or extensions 35"will extend lip-- wardly; so that the plate member 28' maybe employed for engaging-the valveof the type employing-a'slot in it's'upper surface;

. In use, the handleof'theimplement. will be held in one hand and the handle of the bow will beiheld in the'other hand..- The bow will then be moved backwardly' and forwardly and' this reciprocatory' motion will cause the belt topass aroundthe. pulley 12, the belt being-provided with the looped porvalve seat This raising and-lowering of the mightbe considered to be the approved or tion 36 which makes one turn around the annular groove 14in the. pulley. Theoscillatory movement thus imparted-to the spindle 1 will be alsoimparted to the valve engaging member which will causethe valve to be oscillated in the proper manner, As shown in Fig. 4:, the usual coil spring A, generally used on valves of this character, will tend to raise the valve from its seat. While the valve is thus raised, downward pressure 'being removed from the tool, the valve may be turned slightly and while being turned, pressed downwardly so that the valve finds anew seat or new point of contact with its valve, without disconnecting the tool is'especially advantageous, nasmuchas It'permits the emery or other grinding medium, to 5 be more uniformly distributed while the valve is being oscillated,-and the tendency of the valve to force the grinding medium out toward the edge of the valve'seat isgreatly reduced, The spindle may thus'berapidly raisedand L lowered while the bow is being rapidly reciprocated, thereby producing a grinding motion which is especially desir-" able whengrinding valvesof this character. The foregoing description and 'accom- V panying drawings have reference' to: what preferred form of my invention. I desire it tobe understood that I may make'such changes in construction, combination. and an rangement of parts, materials, dimensions, et cetera, 'as-may prove expedient andxfall within the'scope-ofthe appended claims. manner the plate is not only held in position v Having thus fully described my. invention what I claim as new and desire to secure by Letters Patent, is

1. A valve grinder'comprising an oscillatory spindle having a valve; engaging means mounted thereon, a circulardriving member secured to thespindle, a flexible bow comprising a handle having a springwire secured thereto, a belt provided with a loop engaging the said driving: member and having its terminals fixed to the spring wire whereby the said means will impart oscillatory movement to the said circulardriving member when the bow is reciprocated;

2. A valve grinding tool comprising an oscillatory spindle equipped'with valve engaging means and providedwithfa grooved pulley fixed'to the spindle, abow comprising an arcuate spring wire having a loop atone I end and a coil spring at the other end, a belt provided with aloop passing around the 7 said pulley and having one terminal fixed to the loop in the end of the bow, a handle v for the bow-, and'adjustable means passing through the handleandthrough the said coil spring, andsecuredto one end'of said belt, to vary the tension of said belt. 1

3. A valve; grinding tool comprising a' spindle having a grooved wheel fixed intermediate its ends, an actuating member comwith a coupling member and the other terminal providedwith a socket, a flexible belt provided with a loop a passing around the said groove in the pulley, one'end ofthe said belt being joined to the said coupling member at one end of the said how, a handle forf the said bow, a longitudinally adjustable rod passing through the said handle and through the said socket and havin one end fixed to the adjacent end of the said belt, and means to adjust the said rod in the saidhandle to vary the tension of the said belt.

4. A valve grinding tool comprising a spindle, a Wheel fixed to the spindle intermediate its end and provided with an annular groove, a bow provided with a handle, a

longitudinally adjustable rod mounted in the handle and projecting beyond one end thereof, a flexible bow having one end mounted on'thesaid rod and the opposite end provided with a coupling member, a flexible belt having one end joined to the said adjustable rod and. the opposite end joined'to the said coupling member on the said bow, the said belt being provided with a loop passing around the said pulley the said adjustable rod being provided with fastening elements whereby the adjustment'of the rod may be maintained to hold the said belt under the desired tension.

In testimony whereof I afiizl my signature.

" JOSEPH WAINWBLGHT. 

